2. Fitting and pneumatic installation
2−7
Festo P.BE−CPX−CMA X−SYS−EN en 0908NH
2.3.1 General mechanical requirements
Note
Connect the drive, guide, displacement encoder and load
with as little backlash as possible and align them flush
with each other.
Mechanical backlash, e.g. between the cylinder piston
rod
and the mass to be moved, leads to poor movement be
haviour (the backlash presents the controller with con
stantly changing mass").
Important for positioning accuracy:
The c
ylinder, guide, position measuring system and load
must be rigid in the direction of movement, have very
little backlash and must be connected flush with each
other.
The backlash between the drive, guide, mass and position
measuring system must be smaller by a factor of 10 than
the required tolerance (max. 0.1 mm).
Note
Transverse loads falsify the measuring results and could
damage the displacement encoder.
· Use an external guide for the effective load in order to
prevent transverse loads on the drive.
· Use mounting attachments which will withstand the
acceleration forces long−term.
· If necessary, provide a sufficiently large energy chain in
order to minimise the effects of bending forces on the
positioning behaviour.
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